The alkaloid (+)-R-decarbomethoxytetrahydrosecodine (+)-1 has been synthesized by alkylation of (R)-3-ethylpiperidine with 3-(2-bromoethyl)-2-ethylindole (7). The required enantiopure piperidine was prepared by alkylation of the chiral non-racemic oxazolopiperidone (+)-trans-8 followed by reduction of the lactam carbonyl group and removal of the chiral auxiliary, whereas tryptophyl bromide 7 was obtained